When Sheba confronts Barbara about her diary, the makeup (eyeliner) she has smudged by crying changes. One moment she had dark thick eyeliner on, the next moment she has very little of eyeliner still on, and then the eyeliner comes back as before.
When Barbara tries to tear away Sheba to return to the vet's office with her, the front passenger-side door of Sheba's automobile is opened/closed from shot to shot.
When Brian and Barbara are sitting at her table, Barbara's cigarette has an inconsistent length.
In the staff meeting where everyone is seated in a circle at the beginning of the film, Barbara can be seen waiving at Sheba to get her attention as Sheba walks in late, even though they haven't yet met.
When Sheba goes up to her daughter's bedroom, she is listening to music on headphones, which disappear too quickly between shots.
The LP that Steven picks up in Sheba's workshop is "Kaleidoscope" by Siouxsie and the Banshees (1980). The band's song that plays over the scene, however, is "Dizzy," which was first released as a single in 1992.
When Sheba is rampaging through Barbara's house in search of her journal, you can see a crew member in the mirror behind her as she goes to sit.
When Barbara is led into the living room by Richard and invited to sit, the boom mic is visible in the reflection of the picture frame.
Steven is stated as being fifteen years old and in Year 10. Pupils become fifteen during Year 10 (except in exceptional circumstances). Later in the film, Sheba states that he is going to be sixteen in May, i.e. he was already fifteen before entering Year 10.